i've found that the setup.exe in the Windows 10 iso has installation options which will force an upgrade.

for future reference and to answer my own question:
Download the iso with the media...

I am searching for alternatives for recalling all the devices and perfom a reinstall/upgrade, so we are investigating the in-place upgrade option that Windows 8.1 has available; however, it gives you...

Hello W10Forums;

We are thinking about releasing the Windows 10 upgrade into the wild on the machines of our customers. However, since we are using specific management software e.t.c., we do not...